EDIT The Unicode Standard (v 5.1) describes this character as follows:
0149 LATIN SMALL LETTER N PRECEDED BY APOSTROPHE
= latin small letter apostrophe n (1.0)
* Afrikaans
* legacy compatibility character for ISO/IEC 6937
* uppercase is 02BC 004E
# 02BC 006E

In plain words, this reads:
-It has only been included to allow easy conversion of texts in the ISO/IEC 6937 encoding into Unicode.
-Use \'n instead (two characters: apostrophe + n).

 Geke